PREFACE, 



By the present Volume my Account of the 3 leading divisions of 

 Copepoda, the Calanoida, Harpacticoida and Cyclopoida is finaly concluded. 

 Yet there still remains a considerable bulk of Copepoda of a more or less pro- 

 nouncedly parasitic nature, the most familiar of which are the genuine Fish- 

 parasites, the Caligoida and the Lernceoida. These 2 divisions have however 

 recently been so carefully treated of in the excellent and beautifully illustrated 

 work of Th. & A. Scott (British parasitic Copepoda), that a renewed account 

 of these forms appears to be less needed. On the other hand, 2 other 

 anomalous divisions of Copepoda, likewise in some measure parasitic in 

 habits, but not included in the above mentioned work, viz., the Monstrilloida 

 and the Notodelphyoida, may be more worthy of a careful reexamination. It is 

 indeedmy purpose in the next Volume now in preparation to give an exhaus- 

 tive account of the Norwegian forms referable to these 2 interesting divisions, 

 which in some respects show relations partly to the free-living Copepoda, 

 partly to the true parasites. 



I take the occasion again to express my most sincere thanks to the 

 Direction of the Bergen Museum for the interest it has shown for my work 

 and for the kindness in giving me an opportunity of still continuing it, in 

 spite of the many obstacles which in these difficult times have arisen against 

 the printing and publication. 



Q. O. Sars. 



